3256240261 has 2 divisors, whose sum is σ = 3256240262. Its totient is φ = 3256240260.

The previous prime is 3256240243. The next prime is 3256240289. The reversal of 3256240261 is 1620426523.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3248316036 + 7924225 = 56994^2 + 2815^2 .

It is an emirp because it is prime and its reverse (1620426523) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3256240261 - 2²³ = 3247851653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3256243261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1628120130 + 1628120131.

It is an arithmetic number, because the mean of its divisors is an integer number (1628120131).

Almost surely, 2^3256240261 is an apocalyptic number.

It is an amenable number.

3256240261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3256240261 is an equidigital number, since it uses as much as digits as its factorization.

3256240261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 3256240261 is about 57063.4757178355. The cubic root of 3256240261 is about 1482.1954664739.

Adding to 3256240261 its reverse (1620426523), we get a palindrome (4876666784).

The spelling of 3256240261 in words is "three billion, two hundred fifty-six million, two hundred forty thousand, two hundred sixty-one".